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Contra Costa

County in California (USA)

Contents: Population

The population development of Contra Costa as well as related information and services (Wikipedia, Google, images).

Contra CostaCounty803,732948,8161,049,0251,165,9271,161,413
USA [United States of America]Federal Republic248,709,873281,421,906308,745,538331,449,281331,893,745

Source: U.S. Census Bureau (web).

Explanation: All population totals refer to 2020 boundaries. The 2021 gender and age figures are not fully based on results of the 2020 census.


Further information about the population structure:

Gender (E 2021)
Males570,925
Females590,488
Age Groups (E 2021)
0-17 years257,360
18-64 years710,124
65+ years193,929
Age Distribution (E 2021)
0-9 years131,920
10-19 years152,407
20-29 years133,097
30-39 years156,940
40-49 years158,870
50-59 years160,481
60-69 years136,414
70-79 years87,808
80+ years43,476
»Race« (C 2020)
White501,697
Black/African American101,485
Indigenous12,043
Asian217,823
Pacific Islander6,250
Some other173,154
2 or more153,475
Ethnicity (C 2020)
Hispanic or Latino314,900
Other851,027

See also:

Located in:


USA: Counties